Cross-staffs
Esquema
Jerarquía
Furnishings and Equipment (Hierarchy Name) > Measuring Devices (Hierarchy Name) > measuring devices (instruments) > <measuring devices for extent> > distance measuring devices > angle measuring devices > vertical angle measuring devices
Descripción
Calibrated wooden rods with sliding crosspieces used for measuring the altitude of celestial bodies; forerunnners of modern sextants.
URI original del concepto
Otros términos
- jakobsstaven (meetinstrumenten) [nl]
- ballestinas [es]
- cross-staff [en]
- cross-staves [en]
- forestaffs [en]
- Jacob's staffs [en]
- Jacob's staves [en]
- staffs, Jacob's [en]
- jakobsstaf (meetinstrument) [nl]
- jacobsstaaf [nl]
- jacobsstaven [nl]
- ballestina [es]